Wiring And Installation; Installation Site - YOKOGAWA FLXA402 User Manual

2.

Wiring and Installation

Open the front panel and remove the shield cover and then install the cable glands. The shield
cover will be re-installed after the wiring is completed.
For details, refer to the User's Manual IM 12A01F01-02EN.
2.1

Installation site

The FLXA402 is weatherproof and can be installed both inside and outside. It should, however,
be installed as close as possible to the sensor to avoid long cable runs between the instrument
and sensor.
Select an installation site where the ambient temperature and humidity are within the limits of the
instrument specifications as below. If the instrument is installed outside and exposed to direct
sunlight, a sun shade hood should be used.
Ambient Operating Temperature: -20 to +55 ºC
Storage Temperature:
Humidity:
Select an installation site that meets the following conditions.
• Mechanical vibrations and shocks are negligible
• No relay switch and power switch are installed close to the converter
• There is space for cable connection beneath the cable glands
• Not exposed to direct sunlight or severe weather conditions
• Maintenance is possible
• No corrosive atmosphere
The FLXA402 can be mounted on a wall, pipe or panel when the mounting kit is ordered. For
dimensional information please refer to the User's Manual IM 12A01F01-02EN.
CAUTION
When you open the front panel, make sure the screws are completely out of the screw holes, and
then open the front panel slowly in order not to damage the threaded parts on the housing. If the
threaded parts are damaged and the screws cannot be tightened, the waterproof performance
will deteriorate.
NOTE
Be careful not to lose the four front panel screws.
2.2 Wiring
2.2.1 Preparation
Power supply and relay contact (if equipped) should be connected first. Those terminals are
behind the shield cover. Next, connect the others. For details, refer to the User's Manual IM
12A01F01-02EN. Read it carefully before wiring.This manual describes how to use the FLXA402
with Yokogawa's or other companies' sensors. Please read carefully this manual and the
instruction manuals relevant to those sensors you use before using this instrument.
WARNING
• Cables that withstand temperatures of at least 75 °C should be used for wiring.
• Wiring work should be performed to meet IP66 or higher requirements. Tighten four front
panel screws to the following torque; 1.5 to 1.6 N·m
• Use cables that comply with UL2556VW-1 or equivalent.
• Always place the shield cover over the power supply and contact terminals for safety
reasons and to avoid interference.
<Start-up and Safety Precautions>
-30 to +70 ºC
10 to 90% RH at 40ºC (Non-condensing)
IM 12A01F02-01EN 2nd Edition : Apr. 19, 2019-00
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